Artificial joint with self-repairing textured composite film structure and preparation method

Abstract

The invention discloses an artificial joint with a self-repairing textured composite film structure and a preparation method. The artificial joint comprises a radiation cross-linked ultra-high molecular weight polyethylene joint cup and a zirconia ceramic joint head, a circular hole micro-texture is processed on the inner surface of the joint cup, a capillary texture is processed on the surface of the joint head, and a layer of self-repairing textured composite film is grafted on the inner surface of the joint cup in friction with the joint head. The texturing adopted by the invention can improve the storage performance and the self-lubricating performance of the lubricating liquid to a great extent, and meanwhile, the self-repairing textured composite film can also enhance the adhesive force on the surface of the joint cup and is firm in combination; and the artificial joint is good in wear resistance and has the functions of self-repairing and sterile loosening prevention, and the service life of the artificial joint is prolonged.

Description

technical field [0001] The invention belongs to the field of implant medical devices, in particular to an artificial joint with a self-repairing textured composite film structure and a preparation method thereof. Background technique [0002] The artificial joint formed by the combination of radiation-crosslinked ultra-high molecular weight polyethylene acetabular cup and ceramic joint head has the advantage of high cost performance, and is still widely used clinically. During daily activities, artificial joints are prone to wear under repeated friction, especially in the load zone. Clinical trials have found that radiation-crosslinked ultra-high molecular weight polyethylene and zirconia ceramic joints will also produce a large amount of wear debris, and the accumulation of wear debris in the body will induce a series of adverse biological reactions in the basal cells, leading to a series of adverse biological reactions around the prosthesis. Osteolysis and aseptic looseni...

AI Technical Summary

Problems solved by technology

[0003] In recent years, the methods to improve the wear resistance of radiation-crosslinked UHMWPE joint cups mainly include carbon brazing fiber and filler nano-particle reinforcement modification; the main method to improve the wear resistance of ceramic joint head is also filler nano-particle reinforcement modification, however While these methods improve wear resistance, the filling of carbon fibers and nanoparticles has not yet been evaluated for biocompatibility and medical clinical aspects.

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